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Method for preparing magnetic fluorescent graphene composite nano ion probes

A graphene composite and magnetic graphene technology, applied in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., can solve problems such as inability to adsorb and separate metal ions, achieve rapid detection and separation, increase binding sites, The effect of simple process

Inactive Publication Date: 2016-01-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, quantum dots can only detect metal ions, and cannot effectively adsorb and separate metal ions. Based on this, firstly synthesize magnetic fluorescent composite nanoparticles, and introduce specific functional groups on their surface, such as hydroxyl, carboxyl, amino, alkane base or special molecules to achieve efficient and sensitive detection and separation of metal ions

Method used

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  • Method for preparing magnetic fluorescent graphene composite nano ion probes
  • Method for preparing magnetic fluorescent graphene composite nano ion probes
  • Method for preparing magnetic fluorescent graphene composite nano ion probes

Examples

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Embodiment 1

[0026] 1.1 ZnSe quantum dots were prepared by the aqueous phase method. Under nitrogen protection, 0.01gNaBH 4 Dissolve 0.0061g of Se powder in 2mL of distilled water, heat to 40°C, and obtain NaHSe solution after completely dissolving; take 0.0439g of Zn(Ac) 2 Dissolve in 20mL of distilled water, add 0.0737g of reduced glutathione after it is completely dissolved, adjust the pH to 11.5 with 1mol / L NaOH solution, and obtain the Zn precursor solution; transfer the Zn precursor into a three-necked flask , quickly inject NaHSe solution under the protection of nitrogen, reflux the oil bath at 100 ° C, magnetically stir for 1 h, take it out and put it in the refrigerator to cool to room temperature quickly to obtain a colorless and transparent solution, which is the prepared ZnSeQDs solution.

[0027] 1.2 Preparation of magnetic graphene nanocomposites by hydrothermal method. Dissolve 0.1g of ferric chloride hexahydrate, 0.2g of sodium acetate and 0.05g of graphene oxide in 5mL o...

Embodiment 2

[0031] 2.1 Preparation of ZnSeZnS quantum dot solution. Firstly, ZnSe quantum dots were prepared by chemical co-precipitation method, and the preparation method was as described in the above-mentioned Example 1. Take 15mL of prepared ZnSe quantum dots, wherein the concentration of ZnSe quantum dots is 2.7×10 -3 mol / L, add 0.0138gZn(Ac) 2 , 0.0277g reduced glutathione and 0.01g thiourea, adjust the pH value to 10.5 with a prepared concentration of 1mol / L NaOH solution, under magnetic stirring, reflux the oil bath at 100°C, and put it in the refrigerator after magnetic stirring for 2 hours Rapidly cooling to room temperature to obtain light yellow water-soluble ZnSeZnS quantum dots with high luminous efficiency.

[0032] 2.2 Preparation of magnetic graphene nanocomposites by hydrothermal method. Dissolve 0.3g of ferric chloride hexahydrate, 0.7g of sodium acetate, and 0.2g of graphene oxide in a mixed solution of 8mL of ethylene glycol and 1mL of diethylene glycol, and after ...

Embodiment 3

[0036] 3.1 CdTeZnS quantum dots were prepared by the aqueous phase method. Firstly, CdTe quantum dots were prepared by chemical co-precipitation method, under the protection of nitrogen, 0.0945gNaBH 4 Dissolve 0.0063g Te powder in 5mL distilled water, heat to 40°C, and get NaHTe solution after completely dissolving; take 0.293g Cd(Ac) 2 Dissolve in 100mL distilled water, add 2.0mmol thioglycolic acid after it is completely dissolved, adjust the pH=11 with 1mol / L NaOH solution, and obtain the precursor solution of Cd; transfer the precursor of Cd into a three-necked flask, The NaHTe solution was quickly injected under the pressure, and the oil bath was refluxed at 100 ° C. After magnetic stirring for 4 hours, it was taken out and placed in the refrigerator to cool rapidly to room temperature to obtain a colorless and transparent solution, which was the prepared CdTeQDs solution. Take the prepared CdTe quantum dots and dissolve them in 30mL distilled water, wherein the concentr...

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Abstract

The invention belongs to the preparation field of nanoprobes, particularly relates to a method for preparing magnetic fluorescent graphene composite nano ion probes, wherein the magnetic fluorescent graphene composite nano ion probes comprise magnetic graphene and fluorescent nanoparticles, magnetic nanoparticles are excellent superparamagnectic ferroferric oxide nanoparticles, the fluorescent nanoparticles are water soluble quantum dots capable of adjusting fluorescence color, the whole magnetic fluorescent graphene composite nano ion probes have dual purposes of magnetism and fluorescent, fluorescent quantum dots are uniformly distributed on the surface of a magnetic grapheme lamellar structure, the particle sizes of the magnetic nanoparticles are 10-200nm, and the particle sizes of the quantum dots are 1.5-10nm. The method for preparing the magnetic fluorescent graphene composite nano ion probes can achieve rapid detection and separation of copper ions through the magnetic performances of specific molecular ligands decorated on the surfaces of the quantum dots and magnetic nanoparticles. The magnetic fluorescent graphene composite nano ion probes are simple, rapid and sensitive copper ion specific detection reagents, and have wide application prospect in biomolecule detection and separation fields.

Description

technical field [0001] The invention belongs to the field of nano-probe preparation, and in particular relates to the preparation of a magnetic fluorescent graphene composite nano-ion probe. The composite particle has both the fluorescence performance of quantum dots and the magnetic performance of magnetic nanoparticles, and can realize the detection of copper ions. Rapid detection and separation have broad application prospects in the field of biomolecular detection. Background technique [0002] With the rapid development of my country's industry and the gradual acceleration of urbanization, heavy metal pollution has caused great harm to human health and the environment. As an important heavy metal ion, copper ion is widely present in various water bodies produced in industry. On the one hand, copper ion is an essential element of life for the human body. It is an active substance that constitutes serum protein and cytochrome oxidase in organisms, and plays an important ...

Claims

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Application Information

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IPC IPC(8): G01N21/64C09K11/02C09K11/88
Inventor 刘福田丁永玲孙康宁杨路平唐秀宋圆圆张康
Owner UNIV OF JINAN
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